Warning: Epically long post.
Some empiricial data to ponder
Data scraped in 2017 from a popular provider of online ticklists provides some data on climbers performances. As users get “points” for climbing routes of a certain grade, they are incentivised to log routes or boulders at the highest possible grade they can get away with, regardless of what they think. Also, there is no system of signing off the ascents by belayers so not all ascents logged will have taken place. However, noisy data is better than no data.
As we can see, the best performance ever on fully worked routes has a somewhat bell-shaped distribution with median around 7b and with a premium for climbing a route graded 8a. (Much like there are lots of Marathon runners finishing just under 3 hours, but not many in just over 3 hours.)
The median best performance is surprisingly stable over time and shows signs of only slow increase over fifteen years:
Code:
year "2003" "2004" "2005" "2006" "2007" "2008" "2009" "2010" "2011" "2012" "2013" "2014" "2015" "2016" "2017"
Median of top grade "7b" "7b" "7b" "7b" "7b" "7b" "7b" "7b" "7b" "7b" "7b+" "7b+" "7b+" "7b+" "7b+"
As some users never climb in the redpoint style the premium for climbing 8a is actually understated in the chart above.
If we look at the distribution of only redpoint ascents:
we see that the mode is 8a, even though the median is 7b+
Climbers who can get up an 8a with enough work are clearly more likely to put in the required effort than those who can get ut 7c+ with enough work.
This effect is slightly less pronounced if we look at ascents at a stable level. Here are the distributions for highest onsight grade and highest grade achieved “Second Go”
There is still clearly a premium for ascending 8a in faster styles as well.
For bouldering
The median of the best performance in bouldering is not improving any quicker than those of sport climbing
Code:
year "2003" "2004" "2005" "2006" "2007" "2008" "2009" "2010" "2011" "2012" "2013" "2014" "2015" "2016"
Median of top grade "7B" "7B" "7B" "7A+" "7A+" "7B" "7B" "7B" "7B" "7B" "7B" "7B" "7B+" "7B+"
[,15]
year "2017"
Median of top grade "7B+"
To compare highest red-point grade with highest onsight grade we only look at users who have logged a reasonable amount of climbs in both styles.
Say at least both 100 red-point and onsight ascents.
Scatterplot
Grouped boxplot:
As we can see, the best redpoint and onsight grade are highly correlated ($R^2=$0.8716624). There seems to be about 2 full letter-grades between the hardest redpoint and the hardest onsight for climbers having climbed 8b or harder, as per JiBe’s old rule-of-thumb. The median best onsight grade for a climber having redpointed 8c is 8a etc. There are two and a half letter grades between the redpoint and the onsight grade for climbers having climbed from 7c to 8a+ at best. Fully half of the climbers having redpointed 8a have onsighted 7b+. For climbers having redpointed no harder than 7b+ there is just two letter grades difference.
Ideally the difference should be the same across the grades. The discrepancy could be explained by significant grade inflation in the higher grades (that is, the difference between becomes smaller the harder the routes) or that elite climbers are not pursuing onsight ascents outdoors for whatever reason.
In case you are wondering, there is no big difference is we look at the highest grade achieved redpoint vs onsight in a single year.
Relation between performances in bouldering and sport-climbing
There is a fairly strong relationship between best bouldering grade and best redpoint grade as well. This is of course unsurprising since harder routes generally have harder cruxes. For climbers who have logged at least N=100 boulders and the same amount of redpoint ascents, it seems like the typical bouldering strength required to climb an 8a route is about 7B+ whereas 25% of those who can do 7B have also done 8a. The lowest bouldering strength required for someone doing a fair amount of bouldering to do 8a is 7A.